Printing machine



Oct. 2, 1934, w. T. GOLLWITZER PRINTING MACHINE s Shets-Sheet 1 Filed NOV. 2. 1931 O Z, '1 w. T. GOLLWITZER PRINTING MACHINE Filed Nbv. 2. 1951 3 Sheets-Sheet 2 1720612 01% fidavi 15 3 i7 MW 9W w. T.'GOI..LWITZER 1,975,318

' PRINTING MACHINE Filed Nov. 2, 1951 s Sheets-Sheet s ing device guideway 22 to printing position above the anvil 23 by a suitable mechanism, one form of which is disclosed in my referred to co-pending application Serial No. 469,953, filed July 23, 1930. The impressions are made through an ink ribbon (not shown) stretched over the printing device in printing position and a step-by-step movement is imparted to the ribbon by a suitable mechanism as, for example, such as that disclosed in my co-pending application Serial No. 467,783, filed July 14, 1930.

Impressions are made from the printing device through the ink ribbon onto the sheet by platen P which may be of the kind disclosed in my copending application Serial No. 467,784, filed July 14, 1930. The platen is mounted on the shaft 25 journaled in bearing disposed adjacent the rear edge of the bed. Formed as an extension of the platen arm 24 is an arm 27 which depends below the shaft 25. At the lower end of the arm 27 is a half -round lug 28. An arm 29 pivotally mounted at 30 on a bracket 31 depending from the bed 26 has a notch 32 in the upper edge thereof. The lug 28 seats in the notch 32 to hold and latch the platen arm in its at rest or non-printing position. Suitable means to be described more fully hereinafter are provided for pivoting the arm 29 in a counter-clockwise direction as viewed in Fig. 2 whereby the notch is retracted from engagement with the lug 28 to unlatch the platen arm 24 which then pivots about the shaft 25 by reason of the weight of the overhanging extent thereof and the weight of the platen at outer end. This downward pivoting movement of the platen arm moves the platen toward printing position. The platen moves toward printing position Without being connected to the driving means therefor and the platen so moves until it attains a predetermined position whereat it is so close to the sheet to receive the impression that there is not sufficient room for the operators finger or other obstruction to be positioned intermediate the platen and the sheet. When the platen moves into such predetermined position, pressure is applied by the connection of the platen arm with the driving means th refor. Until the time pressure is applied to the platen arm it may be freely moved about the shaft 25 or it may be grasped and held against movement. Thus since the platen is not connected to the driving means therefor and as the platen and the arm 24 are made as light as possible consistent with proper operation of the machine, the operators fingers will not be injured should the platen strike thereagainst nor will the machine be damaged if the platen engages some rigid construction.

At the time the platen moves into the predetermined position, a driving means is connected thereto and impression pressure is applied by the platen. The driving means includes an eccentric disc 33 fast on the main drive shaft 11 and disposed about the periphery of the eccentric is an eccentric bushing 34 which, in turn, is surrounded by a clamp strip 35 retained in position by the clamp portion 36. Unitary with the clamp strip 35 is an arm 37 carrying a block 38 providing a shoulder 39. A pawl 40 is pivotally mounted at 41 at the lower end of the arm 27 on the side thereof and in the plane above the halfround lug 28. The pawl has a nose 42 at one end thereof and a shoulder 43 at the other end. A spring 44 extends between the pawl 40 and a spring anchor on the arm 27 and tends to pivot the pawl in a counter-clockwise direction as viewed in Fig. 3. Fast to the bracket 31 and extending outwardly therefrom is an arm 45 having a cam surface 46 on the upper edge thereof and when the lug 28 is seated in the notch 32, the spring 44 so acts on the pawl 40 that the nose 42 thereof is held on the cam surface 46. When the platen arm is unlatched to permit the platen to move toward printing position, the nose 42 rides along the cam surface 46 and at the time the platen moves into the above described predetermined position, the nose 42 will reach the end of the cam surface 46 and will fall therefrom whereupon the shoulder 43 is moved into the path of the I shoulder 39 defined by the block 38 fast on the arm 37. During the time the nose 42 is traveling along the cam surface 46 the eccentric 33 will be so rotating with the shaft 11 that the arm 37 will be moving away from the shaft, toward the left as viewed in Fig. 3, and at the time the shoulder 43 engages the shoulder 39 the arm 37 will have been so moved as to be close to the limit .of its movement in the above described direction but it will continue to move in this direction after the engagement of the shoulders 43 and 39 in an amount sufficient to move the platen into printing position and to apply impression pressure thereto. The arm 37 includes a hook-shaped end portion 47 and a boss 48 is provided on the arm 27 in alignment with the arm 37 and is adapted to be partially embraced by the hook-shaped end portion 47. The pawl 40 is pivotally mounted on the boss 48 at the outer end thereof and the hookshaped end portion 47 is disposed between the adjacent portion of the arm 27 and the pawl. Immediately after the arm has imparted impression pressure to the platen P the eccentric 33 operates to move the arm 37 toward the shaft 11, to the right as viewed in Fig. 3, and the hookshaped end portion 47 engages the boss 48, and

as the arm 37 continues to move toward-the shaft.

this movement will be imparted to the arm 27 and therefore to the platen arm 24 which will move the platen back into its upper or non-printing position. If the arm 29 has returned to the position shown in Fig. 3, the lug 28 will .again seat in the notch 32 whereby the platen will be latched in its non-printing position. However, should the arm 29 not be so positioned that the lug 28 may seat in the notch or when the arm 29 is pivoted to retract the notch 32, the platen arm will be unlatched and will be free to fall as above described and at the time the nose 42 rides off the cam surface 46, the shoulder 43 will again engage the shoulder 39 and impression pressure will again be imparted to the platen.

If some obstruction lies in the path of the platen after it has been unlatched and the platen is prevented from moving into the predetermined position, the nose 42 will not move to the end of the cam surface 46 and hence the shoulder 43 will be prevented from moving into the path of the shoulder 39 and consequently no impression pressure Will be imparted to the platen. Since impressionpressure cannot be imparted to the platen until it attains the predetermined position and until the shoulder 39 on the arm 37 has moved sufficiently to engage the shoulder 43 should said shoulder lie in the path of the shoulder 39, it is apparent that the platen arm 24 may be grasped and pivoted about the shaft 25 and unless and until the platen moves into the predetermined position, the shoulder 43 will be prevented from moving into the path of the shoulder 39. However, the hooked end portion 47 is always disposed in position to engage the boss 43 .and therefore even though the platendoes not bosses atsoms2-tims2 in the travei tnereof a to-so as-to be movable 'therewith is arterial-56',-

and th'e edge is tapered adjacent the free ma '49 is provided with a flattened portion and notches seeders conse uently the'rpiateniarnmvilt be nfoved baei i n'-thearm'-29*-%d -i-etra'ct'said arm rem-a esa; intomo -pr nt fie p s t v y time itifis'i re: 'tio 'vvhreat'the1ug' 28 will seatrithe notch" leased :wh'ether or not impression pi-essure is apfir'e a e; hen the rod 49 'is arranged as" piiedthereby-L' 1 A sho **'iri*Fig 1-5, "the platenwill be latched 'in an myw ne dme ane r N 9 4 uppei or" non printingpositioiiwhereby any e- 85. I hag g s ib d :9, electon-tmeohanism 'fo'r con sired'printing' device orserie's" of printingde'vices tr oiiingt the':operation of the plateii from ane may we: assed through" the "marine without 4 printin i deviceszs. This A selectorrirmecnanism pfi-ntin'g" ope'rations being" pe'rioriiied "therefrom" cludes a 'head H- wnerein a pliir'a lit'y dt and thus these"printing devicesare; as'it is inafingers F are arranged which ai e positionedtame pp by nsa'e fi identifying whareteiisfibsli It is from the foregoing "description" o the p i s ce andthsepositionedfingers;"that i have providedanovel"safety de'v'i'ce'dor" iri tu'r fip' wimiwma'rt'llifi w use with a printi1ig'"mach'ifie"which willsd'fiinl p sitionin'e o t 52iwlfichti-intiirih; efi tibia-that inj y to "the0perators "fingers or mines the ositioning:oeanarmtehaving ant dam'ag'e to'the"machinewill *be reventedfoi a anguiarly shaped-1ug f54 -mounted adjaoeiit' 'tlie"f impression *pressu're not applied'to the" platen -,ir -q he upwa-rdly eXteHding endf' portiorrunle ss and until it 'movesint'o a position so close t 1531 ta vm n S ""totl iesheet to receive the impression that there upwardlyextending'arm 55 an'd connected-there gt ufiici'ent room'foia fingerb ot r 5;

struotiontobe' disposed"intermediate the platen 10G and'thesl'ieetl Ftirtnermoretne' platenwill' al waysmove'inte' its upper "or i' OriFprintin'g posi tion'aftenit'hasbeehunlatch'e whether or not" itperf ormsa printihg operation 'for the" means which m e the" platen back into" non prin't'ing' 5* ioii' function" during each cycle of operation of the machine" and consequently; even though the platen is grasped and held against'moveinent; tne nea'nstorn loving the platen back into nonprinting position will engage' the device operating therewith at some time during movement thereof; 1!

In the foregoing description I have set forth selected "embodiments of my inventiohbut it is" and-a spring 5TEXtehdsbetWeen-a {spring anchorf 58 positio'ned omt-he arm 29 adjacent'the' notch 32 g and a spring anchor 59' on theamt-561* Another 1 spring GO extends 'between-'a spring =-anchor' 61 f mounting opposite that wl1ereat'= the spring-anchor 58" is 'positionjed arida spring anchor 62''on the'bracket'iil'x Irftheedgefof the arm 55dis'posed' toward the shaft 1'1,'thereis a v sha'ped notch 63" of'thearm' as indicated-atflfiewhereby; an'apex 65 is defined whichis inalignment with the ed'ge 66f of "the arm "5 52' Whenev'e'rtirearm- 53'is so posi-- tionedthatth apex" of U t n yshapedf to'be'jun'ders'tood that'theS'are-capabIe of varia- 11954s a sfi ap fid th sur a 66', the :tions arid modification and i therefore do not arms 55"and Stare-pivoted; Pivoting'on the arm 'wi'sh'ito be limited to the precise details set l' E 'elofigaitewhe' p fi whereby forth biit desire'to avail myself of s uch changes arm"29ispivoted' iir'thecounter clockwise direc "and alterations as fall within thepurview of tion,previouslynescribed, "against the 'acti'onoi "the j 116w1 'g 1aim the springooj the spring'fi'l b'eing'heavierthanthe I claim: 7 spr 01 e p x'o ianeu la'r 1. Ina device of the class described} a pivotally y p d" ""s heap'ex' SS or'th mounted-arm movable betw eenan operative and surface-cattlearm-29 will 'behe'ld in "this lower-an inoperative position, said arm including a porposition' but shou1d'the"arm'53"'be sopositioned" tion below th"pivota1 mounting'thereof,latching that the"triangularlyishaped lugis "disposed'fin" 'means cooperating with the depending portion of the -Shan 'd o h h p edsurfacetaid arm 'for latching said arm in inoperative 64, the spring 69" will act to 'pivot'the" ar'm29 and" position and including a 'movable member; and consequently "thearms"'56"and55into thefpo'simeans for, moving said movablemember for-un-= tionillu'strated'inFig.3 wherebythe'notch'32 wil1 latching said 'a m' b h arm may move be so positione'dthat the'lug 28 may-seattherein." towardoperative position.

Itis sometimes. desirableto "equip a printing" 2. In a printing machine hi h. h machine with a manuallv'operable skipping dequentially' feeding printing devices --through I vicewhich may'be'employed tohoidthe"platen"in" printing-positioh in the machine, a pivotallynon-printing position should it "bedesire'd not mounted platen arm, and a piaten on said p1atento perform a printing operation from" a certain 'arm and movable between printing position in printing device. One arrahg'ement which may? the machine and a non-printing position, the-- be employed for this purpose is 'illustrated' inFigl combinationtherewith-of means for-latchine said 5, andwhe'rein thel-platen operating mechanisms" platen arm tohold said platen 'innon-printing heretofore describ'edare illustrated. In this inposition and including a pivotally mounted arm, stance however a rod 49 is pivotally connected to and means yieldably connected to said arm and l i-G the arm 56 and this rod extends to the front includingamanually operable rod for controlling of the machine Whereat a knob 50 is provided, the the operation of said latching means. rod extending through an opening 51 in the 3. In a device of the class described, a, piv.. apron 51 at the front of the machine. The rod otally mounted arm having a part depending below the pivot therefor, a dog pivotally mounted at the lower end of said part, a cam plate upon which the dog rides, and means for driving said 50' and 49 are provided in the lower edge of this flattened portion, either of which notches may be engaged with the portion of the apron arm when said arm moves into a predetermined adjacent the opening 51. When the notch 49 position and including a member engageable by engages the apron, the rod 49 so positions the said dog when said dog rides off the end of said having a part depending below the pivot therecam plate as said arm moves into said predetermined position.

4. In a device of the class described, a pivotally mounted arm having a part above its pivot and a part depending below the pivot therefor, a dog pivotally mounted at the lower end of said last named part, a cam plate upon which the dog rides, and means for driving said arm and including a member adapted to be disconnected from said last-named part during the major portion of the descent of the first named part of said arm and engaged with said last named part to effect ascent of said first named part and including a device adapted to be engaged by said dog when said first named part moves into a predetermined position and said dog rides off the end of said cam plate as said first named part moves into said predetermined position.

5. In a device of the class described, a frame, a platen arm pivotally mounted in said frame and for, a dog pivotally mounted at the lower end of said part, a cam plate fast on said frame and upon which the dog rides, driving means mounted in said frame and including a reciprocating arm adapted to be disconnected from said part during the major portion of the descent of said platen arm and adapted to be engaged with said part to efiect ascent of said platen arm, and means on said reciprocating arm and engageable with said dog when said platen arm moves into a predetermined position and said dog rides off the end of said cam plate.

6. In a device of the class described, a frame,

a platen arm pivotally mounted in said frame and having a part depending below the pivot therefor, a dog pivotally mounted at the lower end of said part, a cam plate fast on said frame and upon which the dog rides, a drive shaft, an eccentric on said drive shaft, a band surrounding said eccentric and having an arm connected thereto including a hook at the free end thereof, a boss on. said part and adapted to be engaged by said hook to effect ascent of said platen arm upon movement of the arm operated by said eccentric in one direction, and means on said arm engageable with said dog upon movement of said arm in the other direction and when said platen arm moves into a predetermined position and said dog rides off the end of said cam plate.

7. In a device of the class described, a pivotally mounted arm having a part above its pivot and last named part, a cam plate upon which the cam plate when said arm moves into a predetermined position in the descent thereof, a boss on said last named part, a latch adapted to engage said boss to hold said first named part in an elevated position into which it is moved by said driving mean whereby said driving means may be operated without a consequent descent and ascent of said first named part when said latch is engaging said boss, and means for engaging said latch with said boss to retain said first named part in said elevated position during selected operations of said driving means.

9. In a printing machine which has means sequentially feeding printing devices through printing position in the machine, a pivotally mounted platen arm, and a platen on said platen arm and movable between printing position in the machine and a non-printing position, the combination therewith of means for latching said platen arm to hold said platen in non-printing position and including a pivotally mounted arm, and means yieldably connected to said arm and including selectively operable means for controlling the operation of said latching means.

10. In a device of the class described, a pivotally mounted arm having a part above its pivot and a part depending below the pivot therefor, a dog pivotally mounted at the lower end of said last named part, a cam plate upon which the dog rides, driving means and includinga hook engageable with said last named part to effect ascent of the first named part of said arm and permit free descent of said first named part and 5 including another part engageable with said dog when said dog rides off the end of said cam plate when said arm moves into a predetermined position in the descent thereof, a boss on said last named part, a latch adapted to engage said boss to hold said first named part in an elevated position into which it is moved by said driving means whereby said driving means may be operated without a consequent descent and ascent of said first named part when said latch is engaging said boss, and selectively operable means for controlling operation of said latch.

11. In a device of the class described, a pivotally mounted arm having a part above its pivot .and a part depending below the pivot therefor,

trolling the operation of said retracting means.

WALTER T. GOLLWITZER. 

